Reclamation Bond Deposit (Schedule of Reclamation Bond Deposit) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Total reclamation bond deposit	$ 2,622,544	$ 2,622,544
Lexon surety bond cash collateral
Loss Contingencies [Line Items]
Total reclamation bond deposit	2,500,000	2,500,000
Other cash reclamation bond deposits
Loss Contingencies [Line Items]
Total reclamation bond deposit	$ 122,544	$ 122,544

Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DepositsAssetsNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant